I don't think it's as scrutinized as it used to be, though it may feel that way if it's your framework of choice (it is mine).
I feel that SPAs get a lot of scrutiny, but it's spread out among the specific libraries/frameworks. There's also a lot of vocal advocates (as Rails used to have) that makes it feel more balanced.
Over the course of my career, it seems that the "easy" languages (Visual Basic, ColdFusion, Ruby, etc) always get a lot of criticism. I feel like Rails is in a great, mature spot right now, and some exciting things are happening to make it the best positioned for the coming push-back against "Javascript all the things".
I feel that SPAs get a lot of scrutiny, but it's spread out among the specific libraries/frameworks. There's also a lot of vocal advocates (as Rails used to have) that makes it feel more balanced.
Over the course of my career, it seems that the "easy" languages (Visual Basic, ColdFusion, Ruby, etc) always get a lot of criticism. I feel like Rails is in a great, mature spot right now, and some exciting things are happening to make it the best positioned for the coming push-back against "Javascript all the things".